01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.server.dispatch;
30:
31: import javax.servlet.FilterChain;
32: import javax.servlet.ServletException;
33: import javax.servlet.ServletRequest;
34: import javax.servlet.ServletResponse;
35: import javax.servlet.http.HttpServletRequest;
36: import javax.servlet.http.HttpServletResponse;
37: import java.io.IOException;
38:
39: /**
40: * Represents the final servlet in a filter chain.
41: */
42: public class RedirectFilterChain implements FilterChain {
43: // servlet
44: private String _url;
45: private String _queryString;
46:
47: /**
48: * Create the redirect filter chain servlet.
49: *
50: * @param url the URL to redirect to.
51: */
52: public RedirectFilterChain(String url) {
53: _url = url;
54: }
55:
56: /**
57: * Create the redirect filter chain servlet.
58: *
59: * @param url the URL to redirect to.
60: */
61: public RedirectFilterChain(String url, String queryString) {
62: _url = url;
63: _queryString = queryString;
64: }
65:
66: /**
67: * Invokes the final servlet at the end of the chain.
68: *
69: * @param request the servlet request
70: * @param response the servlet response
71: *
72: * @since Servlet 2.3
73: */
74: public void doFilter(ServletRequest request,
75: ServletResponse response) throws ServletException,
76: IOException {
77: HttpServletRequest req = (HttpServletRequest) request;
78: HttpServletResponse res = (HttpServletResponse) response;
79:
80: String queryString = _queryString;
81:
82: if (queryString == null)
83: queryString = req.getQueryString();
84:
85: if (queryString != null && _url.indexOf('?') < 0)
86: res.sendRedirect(res.encodeURL(_url + '?' + queryString));
87: else
88: res.sendRedirect(res.encodeURL(_url));
89: }
90: }
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